Spam is defined as creating posts or topics containing only contentless material of any kind. Users found spamming will receive a warning. Examples include (but are in no way limited to) posts containing nothing but smilies, "+1", "QFT", "this" any other one/few-word contentless combination, joke threads, or posts containing quotes and anything that counts as spam by itself. Adding words to a post with the express intent of avoiding a spam warn will result in a warning. These posts and other similar contributions have no substance and hence are considered spam.
Write something or post nothing.